Show me the steps to solve Complete exercise PE $2-1$ on page $54-$p$\mathrm{.}59$ of the textbook:

PE $2-1.$ Select a process you know well and have gone through multiple times $($e$.$g$.$ registering for courses at a university, paying a bill using an online bill$-$payment system, etc.$).$

Considering this context $($use these steps to help you make your diagram$)$:

a$.$ Identify activities that you need to perform to get the task completed.

b$.$ Identify other actors $($people or systems$)$ that need to do their part so that you will get yours done.

How important is it to separate responsibilities among different actors?

c$.$ Identify a situation in this process that may require decision.

d$.$ Are there any aspects of this process that might require parallel action?

If there are, what modeling constructs would you need to use to express parallel action?

e$.$ Create a process model describing the situation you were considering using the UML activity diagram standard.

Use diagrams.net to create your activity diagram.